Ue using uplink grant-based transmissions and extended power grant-free noma transmissions

Abstract

Systems and methods of providing a NOMA transmission are described. A UE, may determine, while using grant-free UL NOMA transmission in a slot to a gNB, whether to transmit to the gNB an indication for a grant-based UL NOMA transmission in a later slot. In response to a determination to continue grant-free transmission, if the grant-free transmission comprises repetitions of a TB transmission, a power of the TB transmissions is dependent on a number of repetitions remaining and a total number of repetitions or on higher layer signaling from the gNB. A grant-based transmission request and grant-free UL data are sent to the gNB in the slot if the grant-based transmission is to be used in the later slot, and the repetitions of the TB transmission in accordance with the power are sent if the grant-free transmission is to be used in the later slot.

Description

[0001]This application claims the benefit of priority under 35 U.S.C. to U.S. Provisional Patent Application Ser. No. 62 / 670,575, filed May 11, 2018, and U.S. Provisional Patent Application Ser. No. 62 / 697,812, filed Jul. 13, 2018, each of which is incorporated herein by reference in its entirety.TECHNICAL FIELD[0002]Embodiments pertain to radio access networks (RANs). Some embodiments relate to cellular networks, including Third Generation Partnership Project (3GPP) 5th generation (5G) New Radio (NR) (or next generation (NG)) networks. Some embodiments relate to non-orthogonal multiple access (NOMA) transmissions. In particular, some embodiments relate to grant-free NOMA transmissions and NOMA transmissions with multi-slot repetition.BACKGROUND[0003]The use of various types of systems has increased due to both an increase in the types of devices user equipment (UEs) using network resources as well as the amount of data and bandwidth being used by various applications, such as video...

AI Technical Summary

Benefits of technology

The patent text describes a combined communication system that includes both a 3GPP LTE / 4G network and a Next Generation (NG) network. The NG network functions include a mobility management entity (MME), serving gateway (S-GW), paging gateway (P-GW), and access and mobility function (AMF). The system also includes a network function for user authentication, authorization, and data management. The technical effects of the patent text include the ability to provide seamless connectivity and compatibility with previous networks, as well as the ability to handle the growing demand for network resources and the introduction of new technologies, such as non-orthogonal multiple access (NOMA) and multi-slot transmissions.

Problems solved by technology

With the advent of any new technology, the introduction of a complex new communication system engenders a large number of issues to be addressed both in the system itself and in compatibility with previous systems and devices.

Such issues arise, for example, in establishing a grant structure for uplink (UL) communications in NR networks.

In a NOMA scheme, the resources assigned to different UEs are not orthogonal with each other and thus transmissions from the UEs may interfere with each other by arriving on the same resource.

However, if a UE requests a sudden increase in packet size (e.g., for Enhanced Mobile Broadband (eMBB) or URLLC), the use of only grant-free transmission, which is contention-based, may bring about a latency increase due to the shortage of the resources for communication to accommodate the larger packets.

However, when the UE wishes to use more resources than that which can be accommodated by grant-free UL NOMA and the latency incurred through use of the BSR or SR becomes undesirable, another grant request mechanism may be used.

When using the BSR to make a grant request, the delay involved with waiting for the MAC procedure to respond to the SR may be undesirable.

Given that the GTR may carry a single bit, this may puncture the UL data transmission.

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